Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase6.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo): time 0.001337/0.001337, allocations: 99.64 kB / 18.94 MB, free: 2.551 MB / 14.72 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo): time 0.00144/0.00144, allocations: 212.5 kB / 22.24 MB, free: 4.855 MB / 14.72 MB " [Timeout remaining time 180] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo): time 1.449/1.449, allocations: 230.6 MB / 256 MB, free: 7.77 MB / 206.1 MB " [Timeout remaining time 178] loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/package.mo", uses=false) [Timeout 180] "Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/package.mo): time 0.9122/0.9122, allocations: 134 MB / 446.4 MB, free: 9.906 MB / 350.1 MB " [Timeout remaining time 179] Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/package.mo) Using package Modelica with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0+maint.om/package.mo) Using package Complex with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.1.0+maint.om/package.mo) Using package ModelicaServices with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.1.0+maint.om/package.mo) Running command: "" <> buildModelFMU(IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase6,fileNamePrefix="IDEAS_IDEAS_ThermalZones_ReducedOrder_Validation_VDI6007_TestCase6",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase6,fileNamePrefix="IDEAS_IDEAS_ThermalZones_ReducedOrder_Validation_VDI6007_TestCase6",fmuType="me",version="2.0",platforms={"static"}) [Timeout 660] "Notification: IDEAS requested package Modelica of version 4.0.0. Modelica 4.1.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.002018/0.002018, allocations: 63.12 kB / 0.6185 GB, free: 7.031 MB / 446.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1779/0.1799, allocations: 85.92 MB / 0.7024 GB, free: 1.203 MB / 0.5137 GB Notification: Performance of NFInst.instantiate(IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase6): time 0.6474/0.8273, allocations: 138.7 MB / 0.8378 GB, free: 7.395 MB / 0.6075 GB Notification: Performance of NFInst.instExpressions: time 0.03058/0.8579, allocations: 19.81 MB / 0.8572 GB, free: 4.453 MB / 0.6231 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002731/0.8606, allocations: 71.44 kB / 0.8572 GB, free: 4.383 MB / 0.6231 GB Notification: Performance of NFTyping.typeComponents: time 0.002396/0.863, allocations: 1.348 MB / 0.8586 GB, free: 3.031 MB / 0.6231 GB Notification: Performance of NFTyping.typeBindings: time 0.002587/0.8656, allocations: 1.043 MB / 0.8596 GB, free: 1.984 MB / 0.6231 GB Notification: Performance of NFTyping.typeClassSections: time 0.001619/0.8672, allocations: 430.8 kB / 0.86 GB, free: 1.562 MB / 0.6231 GB Notification: Performance of NFFlatten.flatten: time 0.002478/0.8697, allocations: 1.465 MB / 0.8614 GB, free: 92 kB / 0.6231 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001403/0.8711, allocations: 0.6293 MB / 0.862 GB, free: 15.45 MB / 0.6387 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001399/0.8725, allocations: 0.6698 MB / 0.8627 GB, free: 14.77 MB / 0.6387 GB Notification: Performance of NFSimplifyModel.simplify: time 0.00195/0.8745, allocations: 1.199 MB / 0.8639 GB, free: 13.58 MB / 0.6387 GB Notification: Performance of NFPackage.collectConstants: time 0.0002998/0.8748, allocations: 72 kB / 0.8639 GB, free: 13.51 MB / 0.6387 GB Notification: Performance of NFFlatten.collectFunctions: time 0.000599/0.8754, allocations: 120 kB / 0.864 GB, free: 13.39 MB / 0.6387 GB Notification: Performance of NFScalarize.scalarize: time 0.000514/0.8759, allocations: 384.4 kB / 0.8644 GB, free: 13.02 MB / 0.6387 GB Notification: Performance of NFVerifyModel.verify: time 0.0007914/0.8767, allocations: 437.1 kB / 0.8648 GB, free: 12.59 MB / 0.6387 GB Notification: Performance of NFConvertDAE.convert: time 0.002178/0.8788, allocations: 1.408 MB / 0.8662 GB, free: 11.17 MB / 0.6387 GB Notification: Performance of FrontEnd - DAE generated: time 6.081e-06/0.8788, allocations: 0 / 0.8662 GB, free: 11.17 MB / 0.6387 GB Notification: Performance of FrontEnd: time 1.894e-06/0.8789, allocations: 4 kB / 0.8662 GB, free: 11.17 MB / 0.6387 GB Notification: Performance of Transformations before backend: time 7.008e-05/0.8789, allocations: 3.984 kB / 0.8662 GB, free: 11.16 MB / 0.6387 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 121 * Number of variables: 121 Notification: Performance of Generate backend data structure: time 0.003824/0.8827, allocations: 1.728 MB / 0.8679 GB, free: 9.387 MB / 0.6387 GB Notification: Performance of prepare preOptimizeDAE: time 4.592e-05/0.8828, allocations: 8.031 kB / 0.8679 GB, free: 9.379 MB / 0.6387 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001261/0.8829, allocations: 90.7 kB / 0.868 GB, free: 9.281 MB / 0.6387 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0003533/0.8833, allocations: 171.9 kB / 0.8681 GB, free: 9.113 MB / 0.6387 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001195/0.8845, allocations: 0.703 MB / 0.8688 GB, free: 8.379 MB / 0.6387 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001634/0.8846, allocations: 100.4 kB / 0.8689 GB, free: 8.27 MB / 0.6387 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001075/0.8847, allocations: 55.98 kB / 0.869 GB, free: 8.215 MB / 0.6387 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001127/0.8859, allocations: 0.5691 MB / 0.8695 GB, free: 7.633 MB / 0.6387 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.427e-05/0.8859, allocations: 4 kB / 0.8695 GB, free: 7.629 MB / 0.6387 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.01e-05/0.8859, allocations: 23.94 kB / 0.8696 GB, free: 7.605 MB / 0.6387 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.9e-05/0.886, allocations: 19.98 kB / 0.8696 GB, free: 7.586 MB / 0.6387 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0009931/0.887, allocations: 447.6 kB / 0.87 GB, free: 7.145 MB / 0.6387 GB Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts. Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.004027/0.891, allocations: 2.044 MB / 0.872 GB, free: 5.031 MB / 0.6387 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001162/0.8921, allocations: 475.3 kB / 0.8725 GB, free: 4.562 MB / 0.6387 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0006542/0.8928, allocations: 297.4 kB / 0.8727 GB, free: 4.27 MB / 0.6387 GB Notification: Performance of preOpt evalFunc (simulation): time 3.111e-05/0.8928, allocations: 4.375 kB / 0.8728 GB, free: 4.266 MB / 0.6387 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.000684/0.8935, allocations: 334.2 kB / 0.8731 GB, free: 3.93 MB / 0.6387 GB Notification: Performance of pre-optimization done (n=52): time 2.816e-06/0.8935, allocations: 0 / 0.8731 GB, free: 3.93 MB / 0.6387 GB Notification: Performance of matching and sorting (n=52): time 0.003383/0.8969, allocations: 1.211 MB / 0.8743 GB, free: 2.707 MB / 0.6387 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.923e-05/0.897, allocations: 67.72 kB / 0.8743 GB, free: 2.629 MB / 0.6387 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002733/0.8997, allocations: 2.165 MB / 0.8764 GB, free: 464 kB / 0.6387 GB Notification: Performance of collectPreVariables (initialization): time 5.94e-05/0.8997, allocations: 45.7 kB / 0.8765 GB, free: 412 kB / 0.6387 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006705/0.9004, allocations: 0.6173 MB / 0.8771 GB, free: 15.78 MB / 0.6544 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001822/0.9006, allocations: 174.6 kB / 0.8772 GB, free: 15.61 MB / 0.6544 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001875/0.9008, allocations: 106.3 kB / 0.8773 GB, free: 15.5 MB / 0.6544 GB Notification: Performance of setup shared object (initialization): time 0.0001801/0.901, allocations: 333.9 kB / 0.8777 GB, free: 15.16 MB / 0.6544 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005587/0.9015, allocations: 241.1 kB / 0.8779 GB, free: 14.93 MB / 0.6544 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.000642/0.9022, allocations: 349.9 kB / 0.8782 GB, free: 14.55 MB / 0.6544 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001085/0.9033, allocations: 0.5499 MB / 0.8788 GB, free: 13.96 MB / 0.6544 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.017e-06/0.9033, allocations: 0 / 0.8788 GB, free: 13.96 MB / 0.6544 GB Notification: Performance of matching and sorting (n=75) (initialization): time 0.00198/0.9052, allocations: 0.9303 MB / 0.8797 GB, free: 13.02 MB / 0.6544 GB Notification: Performance of prepare postOptimizeDAE: time 2.037e-05/0.9053, allocations: 4 kB / 0.8797 GB, free: 13.02 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.071e-05/0.9053, allocations: 4 kB / 0.8797 GB, free: 13.02 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005878/0.9059, allocations: 198.4 kB / 0.8799 GB, free: 12.82 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004689/0.9063, allocations: 99.88 kB / 0.88 GB, free: 12.72 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.004038/0.9104, allocations: 2.918 MB / 0.8828 GB, free: 9.695 MB / 0.6544 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0005941/0.911, allocations: 83.64 kB / 0.8829 GB, free: 9.613 MB / 0.6544 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.441e-05/0.911, allocations: 20 kB / 0.8829 GB, free: 9.594 MB / 0.6544 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 13 * Number of states: 0 () * Number of discrete variables: 24 (assEqu.nFai,$PRE.assEqu.nFai,$whenCondition6,$PRE.intGai.nextTimeEvent,$whenCondition5,$PRE.reference.nextTimeEvent,$whenCondition4,$PRE.setTemp.nextTimeEvent,$whenCondition3,$whenCondition1,reference.nextTimeEvent,reference.nextTimeEventScaled,$PRE.reference.nextTimeEventScaled,assEqu.satisfied,$PRE.assEqu.satisfied,mean.y_last,$PRE.mean.y_last,$whenCondition2,intGai.nextTimeEvent,intGai.nextTimeEventScaled,$PRE.intGai.nextTimeEventScaled,setTemp.nextTimeEvent,setTemp.nextTimeEventScaled,$PRE.setTemp.nextTimeEventScaled) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (57): * Single equations (assignments): 56 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 1 system {(2,17,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0007269/0.9117, allocations: 444.1 kB / 0.8833 GB, free: 9.148 MB / 0.6544 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001988/0.9119, allocations: 147 kB / 0.8835 GB, free: 9.004 MB / 0.6544 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001806/0.9137, allocations: 0.8686 MB / 0.8843 GB, free: 8.117 MB / 0.6544 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.873e-06/0.9137, allocations: 4 kB / 0.8843 GB, free: 8.113 MB / 0.6544 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.502e-06/0.9137, allocations: 4 kB / 0.8843 GB, free: 8.109 MB / 0.6544 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.276e-06/0.9138, allocations: 3.984 kB / 0.8843 GB, free: 8.105 MB / 0.6544 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.00308/0.9168, allocations: 1.681 MB / 0.886 GB, free: 6.363 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.226e-06/0.9168, allocations: 0 / 0.886 GB, free: 6.363 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002763/0.9171, allocations: 63.89 kB / 0.886 GB, free: 6.301 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0005254/0.9176, allocations: 190.3 kB / 0.8862 GB, free: 6.109 MB / 0.6544 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.241e-05/0.9177, allocations: 15.98 kB / 0.8862 GB, free: 6.094 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.005634/0.9233, allocations: 4.343 MB / 0.8905 GB, free: 1.531 MB / 0.6544 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.194e-06/0.9233, allocations: 0 / 0.8905 GB, free: 1.531 MB / 0.6544 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002767/0.9261, allocations: 1.212 MB / 0.8917 GB, free: 304 kB / 0.6544 GB Notification: Performance of postOpt removeConstants (simulation): time 0.000541/0.9266, allocations: 174.9 kB / 0.8918 GB, free: 128 kB / 0.6544 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001215/0.9267, allocations: 16 kB / 0.8918 GB, free: 112 kB / 0.6544 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003568/0.9271, allocations: 31.95 kB / 0.8919 GB, free: 80 kB / 0.6544 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001923/0.9273, allocations: 64.39 kB / 0.8919 GB, free: 16 kB / 0.6544 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.961e-05/0.9274, allocations: 20.03 kB / 0.892 GB, free: 15.99 MB / 0.67 GB Notification: Performance of sorting global known variables: time 0.002219/0.9296, allocations: 1.577 MB / 0.8935 GB, free: 14.42 MB / 0.67 GB Notification: Performance of sort global known variables: time 8e-08/0.9296, allocations: 3.938 kB / 0.8935 GB, free: 14.42 MB / 0.67 GB Notification: Performance of remove unused functions: time 0.0009672/0.9306, allocations: 231.7 kB / 0.8937 GB, free: 14.19 MB / 0.67 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 4 (mean.x,assEqu.diff,thermalZoneTwoElements.intWallRC.thermCapInt[1].T,thermalZoneTwoElements.extWallRC.thermCapExt[1].T) * Number of discrete variables: 15 ($whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,mean.y_last,assEqu.nFai,assEqu.satisfied,setTemp.nextTimeEventScaled,setTemp.nextTimeEvent,reference.nextTimeEventScaled,reference.nextTimeEvent,intGai.nextTimeEventScaled,intGai.nextTimeEvent) * Number of discrete states: 9 (intGai.nextTimeEvent,reference.nextTimeEvent,setTemp.nextTimeEvent,mean.x,assEqu.satisfied,assEqu.nFai,setTemp.nextTimeEventScaled,reference.nextTimeEventScaled,intGai.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (37): * Single equations (assignments): 27 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 8 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 2 systems {(2,14,100.0%), (1,3,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.004549/0.9351, allocations: 2.172 MB / 0.8958 GB, free: 12.24 MB / 0.67 GB Notification: Performance of simCode: created initialization part: time 0.001853/0.937, allocations: 0.7462 MB / 0.8966 GB, free: 11.48 MB / 0.67 GB Notification: Performance of simCode: created event and clocks part: time 3.768e-06/0.937, allocations: 0 / 0.8966 GB, free: 11.48 MB / 0.67 GB Notification: Performance of simCode: created simulation system equations: time 0.001061/0.938, allocations: 0.5707 MB / 0.8971 GB, free: 10.89 MB / 0.67 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001249/0.9393, allocations: 235.4 kB / 0.8974 GB, free: 10.67 MB / 0.67 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01634/0.9556, allocations: 9.949 MB / 0.9071 GB, free: 0.5273 MB / 0.67 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0008854/0.9565, allocations: 0.6673 MB / 0.9077 GB, free: 15.82 MB / 0.6856 GB Notification: Performance of simCode: alias equations: time 0.0004202/0.9569, allocations: 105.1 kB / 0.9078 GB, free: 15.72 MB / 0.6856 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0006249/0.9575, allocations: 491.3 kB / 0.9083 GB, free: 15.24 MB / 0.6856 GB Notification: Performance of SimCode: time 1.803e-06/0.9575, allocations: 0 / 0.9083 GB, free: 15.24 MB / 0.6856 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.08022/1.038, allocations: 26.05 MB / 0.9337 GB, free: 5.41 MB / 0.7012 GB Notification: Performance of buildModelFMU: Generate platform static: time 12.56/13.6, allocations: 4 kB / 0.9337 GB, free: 5.406 MB / 0.7012 GB " [Timeout remaining time 646] (rm -f IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase6.pipe ; mkfifo IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase6.pipe ; head -c 1048576 < IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase6.pipe >> ../files/IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase6.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator --tempDir=temp_IDEAS_IDEAS_ThermalZones_ReducedOrder_Validation_VDI6007_TestCase6_fmu --startTime=0 --stopTime=5.184e+06 --stepSize=60 --timeout=50 --tolerance=1e-06 IDEAS_IDEAS_ThermalZones_ReducedOrder_Validation_VDI6007_TestCase6.fmu > IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase6.pipe 2>&1) [Timeout 52.5] [Calling sys.exit(0), Time elapsed: 19.40540415700525] Failed to read output from testmodel.py, exit status != 0: 13.776347538921982 13.792774741 12.910574715 Calling exit ...